Listening: interview with two gardening experts + guerrilla gardening

Here’s the audio and the questions:

http://engexam.info/ielts-cae-practice-tests/cae-listening-practice-tests/cae-listening-practice-test-6/2/

The same exercise on Youtube:

How about some examples of guerrilla gardeners:

How to green the world’s deserts and reverse climate change | Allan Savory. Slow, clear English: